'regularly-formed' originates from the combination of 'regularly' and 'formed', where 'regularly' comes from Latin 'regularis', meaning 'consistent', and 'formed' from Latin 'formare', meaning 'to shape'.

'regularis' transformed into the Old French 'reguler', and eventually became the modern English word 'regularly'. 'Formare' transformed into the Old French 'former', and eventually became the modern English word 'formed'.

Initially, 'regularly' meant 'in a regular manner', and 'formed' meant 'shaped'. Together, they convey the idea of being shaped in a consistent manner.